yeah there r two types of testing done before deploying the 
s/w that is they r user acceptance testing
- alpha testing
- beta testing
alpha testing is done at the devlpers site or in that 
company in the presence of the devloper and tester in a 
controlled environment
nd beta testing is done at users site or the customer end 
the sanitary testing is done to find the stability of the 
s/w i.e it is wide nd shallow testing it means that all the 
functionalities r checked but not in depth.....
QTP its a testing tool ..........